Ⅰ.单句语法填空
1．He broke down and ________(weep) when he heard the news.
答案： wept
2．It was with great________(sad) that we learned of his death.
答案： sadness
3．______________the Internet is of great help，I don’t think it’s a good idea to spend too much time on it.
答案： Although/Though/While
4．Though the famous scientist is in his eighties，he is still________(energy) and works for several hours every day.
答案： energetic
